珠海淇澳岛红树林引进树种的适应性评价

以珠海市淇澳岛红树林引种园23个主要红树林引进树种(2年生)为研究对象,建立涵盖生长适应性、抗逆性、景观价值等多因子的综合评价指标体系,选用层次分析法(AHP)对引进树种进行适应性评价。根据综合评价将红树林引进树种分成4类,表现良好的有拉关木、黄槿、杨叶肖槿和木榄等7种,表现较好的有尖叶卤蕨、海漆等4种,表现一般的有尖瓣海莲、海莲和木果楝等6种,最差的有角果木、正红树和白骨壤等6种。研究认为,拉关木适宜作为低潮滩的先锋造林树种,木榄为中高潮滩的造林树种,而黄槿、杨叶肖槿和海漆可作为高潮滩及堤岸的造林树种,海滨猫尾木、银叶树、海芒果和玉蕊则在滨海城市绿化中更具推广应用价值。

Adaptability Evaluation on Introduced Mangrove Species on Qi-ao Island of Zhuhai City

In the mangrove introduction garden on Qi-ao Island of Zhuhai City,the adaptabilities of 23 mangrove introduced species(2-year-old) were evaluated with the analytic hierarchy process method.A comprehensive evaluation index system was established,covering the growth adaptability,stress resistance,landscape value,and other factors.According to the comprehensive evaluation scores,these introduced mangrove species were divided into 4 categories.There were 7 species showed the best adaptability,including Laguncularia racemosa,Hibiscus tiliaceus,Thespesia populnea,Bruguiera gymnorrhiza,etc.Acrostichum speciosum,Xcoecaria agallocha and other two species performed better.There were 6 species which had the general adaptability,including Bruguiera sexangula,B.sexangula,Xylocarpus granatum,etc.There were 6 species which had the worst adaptability,including Ceriops tagal,Rhizophora apiculata,Avicennia marina,etc.This study suggested that:L.racemosa was suitable as a pioneer tree species planted at low tidal flat,and B.gymnorrhiza was suitable as a major tree species planted at middle and high tidal flat.X.agallocha,H.tiliaceus and T.populnea could be used as tree species at high tidal flat and the sea wall.Dolichandrone spathacea,Heritiera littoralis,Cerbera manghas and Barringtonia racemosa had application value on coastal urban greening.